<!DOCTYPE html>
<!-- 1、获取当前的系统日期值。 -->
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<script type="text/javascript">
		var a = new Date();
		//a.setFullYear(2019);
		document.write(a);
	</script>

</body>
</html>